Katherine have her stop taking prenatal from trader joes for a week two, far fetched but since trader joes is not pharmaceutical grade supplement could be contaminants or too high of a dose of an ingredient. Also I am assuming she is seeing a cardiologist ? So many cardiac changes and compensations during and after pregnancy. Maybe she had an underlying cardiac weakness and the stress of the pregnancy worsened it, I wouldn't assume it was the Breastfeeding...until everything else was ruled out.
Lisa Mooney MSN CNM IBCLC
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